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positives to low rolling resistance? Indirectly plentiful, if we forget handicapped main property, grip that is. Better fuel economy, longer lasting tires (low rolling resistance often comes together with higher wear rating .. and unfortunately less grip), lesser emissions thus less road tax and possibly also lower car price, as i'm guessing that car manufacturers might pay in some countries different taxes or have different incentives from gov-t for selling cars that are certified to better or worse emission standards .. probably passing extra costs to customer within final purchase price.
In my eyes, while cons of stock primacies are lacking wet grip and high price, they have their pros of their limited grip well matching limited NA stock power fun-wise, have stiffer sidewalls then many in eco-tires class providing tighter turn-in feel, last reasonably long (which reduces high cost importance).
Yes, high cost of primacies makes them less desirable purchase as next set, but it's not con for "free" initial set on new car. And i'm not sure that our sporty use and prioritizing speed, thus also grip, should also be attributable to priority list of normal daily drivers that never been to track .. but who outnumber us at least 10 times.
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